76985680873 has 4 divisors (see below), whose sum is σ = 76986386820. Its totient is φ = 76984974928.

The previous prime is 76985680859. The next prime is 76985680883. The reversal of 76985680873 is 37808658967.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 74295495184 + 2690185689 = 272572^2 + 51867^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76985680873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76985680799 and 76985680808.

It is not an unprimeable number, because it can be changed into a prime (76985680883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150790 + ... + 420367.

It is an arithmetic number, because the mean of its divisors is an integer number (19246596705).

Almost surely, 2^76985680873 is an apocalyptic number.

It is an amenable number.

76985680873 is a deficient number, since it is larger than the sum of its proper divisors (705947).

76985680873 is a wasteful number, since it uses less digits than its factorization.

76985680873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705946.

The product of its (nonzero) digits is 121927680, while the sum is 67.

The spelling of 76985680873 in words is "seventy-six billion, nine hundred eighty-five million, six hundred eighty thousand, eight hundred seventy-three".